Name:	isle_EmployeeServiceShareBasedCompensationNonvestedAwardsAggregateCompensationCostToBeRecognizedOverVestingPeriodShareBasedAwardsOtherThanOptions
Namespace Prefix:	isle_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represents the period from grant date after which awards begin to vest.

No definition available.

Name:	isle_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriodAfterGrantDate
Namespace Prefix:	isle_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The non-cash charges included in the additional expenses incurred relating to the write-off of deferred financing costs, issuance costs and other related fees.

No definition available.

Name:	isle_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsMaximumNumberOfSharesForWhichDeterminationOfUltimateAmountToBeAwarded
Namespace Prefix:	isle_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

The period of time in which the equity-based award expires.

No definition available.

Name:	isle_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriod
Namespace Prefix:	isle_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The forfeiture rate assumption that is used in valuing a share-based compensation award on its own shares.

No definition available.

Name:	isle_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedForfeitureRate
Namespace Prefix:	isle_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Description of award terms as to how many shares or portion of an award are no longer contingent commencing one year after the date of grant, on satisfaction of either a service condition, market condition or a performance condition, thereby giving the employee the legal right to convert the award to shares, shown as a percentage.

No definition available.

Name:	isle_VestingRightsPercentageCommencingOneYearAfterGrantDate
Namespace Prefix:	isle_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Description of award terms as to how many shares or portion of an award are no longer contingent on anniversary of grant date, on satisfaction of either a service condition, market condition or a performance condition, thereby giving the employee the legal right to convert the award to shares, shown as a percentage.

No definition available.

Name:	isle_VestingRightsPercentageOnAnniversaryOfGrantDate
Namespace Prefix:	isle_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Description of award terms as to how many shares or portion of an award are no longer contingent on first anniversary of the grant date, on satisfaction of either a service condition, market condition or a performance condition, thereby giving the employee the legal right to convert the award to shares, shown as a percentage.

No definition available.

Name:	isle_VestingRightsPercentageOnFirstAnniversaryOfGrantDate
Namespace Prefix:	isle_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Description of award terms as to how many shares or portion of an award are no longer contingent on the fourth anniversary of the grant date, on satisfaction of performance condition, thereby giving the employee the legal right to convert the award to shares, expressed as a percentage.

No definition available.

Name:	isle_VestingRightsPercentageOnFourthAnniversaryOfGrantDate
Namespace Prefix:	isle_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

No definition available.

Name:	isle_VestingRightsPercentageOnGrantDate
Namespace Prefix:	isle_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Description of award terms as to how many shares or portion of an award are no longer contingent on the third anniversary of the grant date, on satisfaction of performance condition, thereby giving the employee the legal right to convert the award to shares, expressed as a percentage.

No definition available.

Name:	isle_VestingRightsPercentageOnThirdAnniversaryOfGrantDate
Namespace Prefix:	isle_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.F)

-URI http://asc.fasb.org/extlink&oid=6793087&loc=d3e301413-122809

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(1)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph g(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section F

Name:	us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Aggregate unrecognized cost of share-based awards, other than options, made to employees under an equity-based compensation plan, that have yet to vest.

No definition available.